多项选择题 You received this error message because Oracle Net Services cannot locate the connect descriptor specified in the tnsnames.ora configuration file: ORA_12154: TNS:could not resolve service name Which three actions would be appropriate in helping to resolve the error?()
单项选择题 You have used the CROSSCHECK BACKUP command to verify that the backups recorded in the RMAN repository actually exist. Which command should you now use to check if any of the files were missing?()
单项选择题 WhatdoestheCharacterSetScannercommandlineutilitydo?()